warman.]  POTOMAC POWELL.  631 
Potsdam  sandstone  in  Nevada  and  Utah,  equivalents  of Bull  81,  pp  316-319 
in  New  Jersey Bull  81,  pp  L22-123;  Bull  86,  pp  401,  414 
in  New  York Bull  81,  pp  202-207,  341-347,  390,  414 
in  Newfoundland Bull  81,  pp  51-55 
in  Nova  Scotia Bull  81,  pp  56,  57 
in  Pennsylvania Bull  81,  pp  124-132,  288-289;  Bull  86,  pp  408,  409 
in  South  Dakota Bull  81,  pp  347-349 
in  Tennessee Bull  81,  pp  142-143 
in  Texas Bull  81,  pp  216-219,  355-356 
in  Upper  Mississippi  Valley ...Bull  81,  pp  330-334 
in  I  tali  and  Nevada,  equivalents  of Bull  81,  pp  316-319 
in  Vermont Bull  86,  p  358 
in  Virginia Bull  81,  pp  L34-138,  21)4,  296,  298 
in  Wisconsin Mon  \i\.  p  29;   Bull  81,  pp  172,  175,  176-181 
in  Wyoming Bull  81,  pp  21 1-214,  349-350 
Lingula  sandstone  of  Wisconsin Bull  81,  p  172 
origin  of  name Bull  81,  p  244 
tli in  section  of,  from  Wisconsin,  A  Neman Bull  150,  pp  80-81 
Potsdam  sandstone  ami  limestone  of  Texas,  Pack  saddle  Mountain ^nn  21,  VII,  p  89 
Potsdam  sa  in  1st  one  and  pre-Potsdam  surface.  Pake  Superior  region \nn  7, 
pp  399-414 
Potsdam  series  in  Illinois,  thickness,  etc.,  of Vim  17,  n,  pp  839-840 
stratigraphic  relations  of  <  reorgia  formation  to Bull  30,  pn  20  24 
Potsdamic  rocks,  origin  of  name Bull  81,  p  252 
Pottery  at  Paris  Exposition  of  L900 inn  21,  vi  cont,  pp  369-372 
raw  materials,  methods  of  molding,  trade-marks,  etc.  of \iin  17, 
in  com,  pp  842  880;  MP  L892,  pp  726-731 
statistics  of MB  1882,  pp  471-472;  MP  1883-84,  pp 685-692, 698- 
700;  MR  1885,  pp 419-421;  MP  L886,  pp  571-572;  MP  L887, 
pp  542-545;   MP  1SSS,  pp  571-575;   MP  1889-90,  pp  441-444 
technology  of  manufacture  of Vnn  16, 
iv,  pp  550-553;  Ann  L8,  v  cont,  pp  1020-1021 
Pottery  clay.     (See  Clay,  pottery,  i 
Pottery  industry  of  United  States Ann  17,  in  cont,  pp  842-880 
Pottery  materials,  preparation  of \nn  19,  vi  cont,  pp  378-400 
Pottsboro  beds  of  Texas ...Ann  21,  vn,pp  280-283 
Pottsville   formation  of    Pennsylvania  southern  anthracite  coal  field,   strati- 
graphic  succession  of  fossil  Moras  of Ann  20,  n,  pp  749-930 
Poverty   Gulch,    Cripple   Creek   district.   Colorado,   character  of   ore   deposits 
in Ann  16,  n,  pp  168-170 
Poverty  Gulch  and  Tenderfoot  Hill,  Colorado,  rocks  of Ann  16,  n,  pp  95-96 
Powder  River,  Wyoming,  irrigation  along Ann  13,  in,  pp  71-72 
Powell  (J.  W.) ,  appointment  of,  to  Directorship Ann  2,  pp  xi-xii 
preliminary  report  of  Director  on  the  Irrigation  Survey  (reprint  of) Ann  10, 
ii,  pp  15-29 
reports  of  Director,  1880-1894 Ann  2, 
pp  11-55;  Ann  3,  pp  15-18;  Ann  4,  pp  13-32; 
Ann  5,  pp  17-36;  Ann  6,  pp  15-29;  Ann  7,  pp  3-42; 
Ann  8,  i,  pp  3-93;  Ann  9,  pp3-46;  Ann  10,  i,  pp  3-80; 
Ann  11,  i,  pp  3-30;  Ann  12,  i,  pp  3-19;  Ann  13,  i, 
pp  3-66;  Ann  14,  i,  pp  11-165;  Ann  15,  pp  9-108 
reports  of  Director  on  the  Irrigation  Survey  during  1888-1891 Ann  10, 
ii,  pp  1-65;  Ann  11,  i,  pp  3-30;  Ann  11,  n, 
pp  1-200;  Ann  12,  i,  pp3-19;  Ann  12,  n 
